From owner-freebsd-questions  Sat Nov 15 07:56:52 1997
Return-Path: <owner-freebsd-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id HAA14573
          for questions-outgoing; Sat, 15 Nov 1997 07:56:52 -0800 (PST)
          (envelope-from owner-freebsd-questions)
Received: from woman.kitel.co.kr (woman.kitel.co.kr [210.116.210.106])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id HAA14568
          for <freebsd-questions@FreeBSD.ORG>; Sat, 15 Nov 1997 07:56:47 -0800 (PST)
          (envelope-from swjeong@woman.kitel.co.kr)
Received: from woman.kitel.co.kr (localhost.kitel.co.kr [127.0.0.1])
	by woman.kitel.co.kr (8.8.7/8.8.7) with SMTP id BAA14868
	for <freebsd-questions@FreeBSD.ORG>; Sun, 16 Nov 1997 01:02:36 +0900 (KST)
	(envelope-from swjeong@woman.kitel.co.kr)
Message-ID: <346DC79C.41C67EA6@woman.kitel.co.kr>
Date: Sun, 16 Nov 1997 01:02:36 +0900
From: Jeong Seong Won <swjeong@woman.kitel.co.kr>
Organization: kitel
X-Mailer: Mozilla 3.01 (X11; I; FreeBSD 2.2.5-RELEASE i386)
MIME-Version: 1.0
To: freebsd-questions@FreeBSD.ORG
Subject: Network connection often stops. Why ?
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-questions@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

In my company. About twenty of 686 FreeBSD 2.2.1 Machine is connected
 via FastEthernet.(Intel EtherExpress)
 Hub is SMC tigerstack.(not a switching)
 Problem occurs in the same way when I used SMC 9332BDT.
 Network options         MAXMEM=262144
 Concurrent User is aboue 230 per machine.

 Problem is that suddenly telnet session stop.
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 When this happens, all key stokes is not effective, and at last
 conection is closed.

 vnode, file table, mbuf, somaxconn is sufficient.
 
 kernel configuration is 

....

options         MAXMEM=262144
maxusers        250
options         NMBCLUSTERS=8192
options         CHILD_MAX=3500
options         "FD_SETSIZE=2048"

.....